Means for molding hollow articles with bulged or swelled walls.



No. 880,947. I PATBNTED MAR. s, 1908.

' L. A. WILGZEK.

MEANS FOR MOLDING HOLLOW ARTICLES WITH BULGED O-R SWELLBD WALLS.

APPLICATION FILED JULY 17. 1905.

Wiwrw w W UNITED STATES PATENT oEEIoE.

LUDOVIC AUGUSTE WILGZEK, OF PARIS, FRANCE.

MEANS FOR MOLDING HOLLOW ARTICLES WITH BULGED OR SWELLED WALLS.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed July 17, 1905. Serial No. 270,021.

To all whom it may concern:

Be it known that I, Lnnovro AUGUsTE FVILOZEK, a subject of the Emperor of Austria-Hungary, residing at Paris, France, have invented certain new and useful Improvements in Means for Molding Hollow Articles with Bulged or Swelled Walls, of which the following is a specification.

This invention relates to new or improved means for the preparation of molds for m.old ing receptacles and other hollow articles with bulged or swelled walls.

The means principally comprise corepieces prepared in pairs, each pair being integral with a center-piece which connects the two cores and is of larger diameter than the mouths or orifices of the receptacles to be produced.

The two cores forming a pair, and the center-piece belonging to the said pair, form an integral body of sand, the center-piece being adapted to firmly support the cores freely in the outer mold without the aid of a fixed core-plate or the like.

The invention is illustrated by way of ex ample in the annexed drawing, which represents the improved means for producing two.

pairs of ars.

Figure 1 is a plan-view of a two-part flask C resting on a bottom plate P and containing four patterns B arranged in pairs, each pair of patterns being so arranged that the parts B representing the mouths of the jars are opposite each other and separated by a core print-pattern E. Fig. 1 is a planviewshowing the flask with the cores N inserted therein said cores each having a center piece J integral therewith fitting in the opening produced by the core-print-patterns E. Fig. 2 is a vertical section of a core-box having a cavity N J for producing the lower halves of two cores integral with one half of a centerpiece. Fig. 3 is a plan view of the said coreox. Fig. 4 represents the core which corresponds to the interior of two vessels and an intervening center-piece. Fig. 5 is a crosssection of a mold, with a pair of cores inclosed therein, the said mold being contained in a two-part flask C C Fig. 6 is a cross-section representing two core-boxes for producing the upper and lower halves of a core; this figure also shows a frame R which is placed on the lower core-box to support the sand until the upper core-box is placed in position. Fig. 7 represents a closed molding box, provided with a gate M, and Fig. 8 is a cross-sec- L in the form of a cross.

tion illustrating a device which can be used if ltill: jars are to be provided with feet or the 1 e. 1

The molds are prepared in the following manner: For preparing the outer mold, the lower part 0 of the flask is placed on a reversible plate P which supports the plate D (Fig. 1) on which the two patterns are placed. Each of the two patterns represents at B B the exterior of a half of two vessels placed mouth to mouth at an interval apart the intervening portion representing half of a core-print-pattern E, the purpose of the lat ter being'to produce the circular groove in the mold for the reception of the center-piece J of the core; the flask is filled with sand, and when the necessary pressure has been applied the mold is removed. In this manner each of the molds F and F shown in Fig. 5 is obtained. It is obvious that any desired number of pairs of patterns can be placed in one flask; a flask containing two pairs is merely illustrated by way of example.

The cores N and center-piece J are in one piece and are prepared in a two-part c0rebox A A (Fig. 6) having a cavity of equivalent shape. The half cavity in part A is first filled with sand on the surface of which is placed any suitable strengthening member This member L is preferably of metal and measures along its centraltransverse arms less than the diameter of the mouths of the jars or articles to be cast. The centerpiece L of the core-parts is of smaller diameter than the orifice of the receptacle in order to allow of breaking out the mold, but it must be surrounded by a sand core part of larger diameter than the lateral cores for proper support in the cavity of the mold produced by the core-print-pattern E. A frame R is thereupon placed on the part A and a suitable quantity of sand is placed in the said frame, the latter being then removed. Thereupon the upper part A of the core-box is pressed down on to the part A until the contact-surfaces of the parts A and A meet. The said parts A and A are thereupon separated, and the core piece representing at N N the interior of the vessels and the centerpiece J, can be removed from the core-box and placed in the mold F. When this is done the center piece J exactly fits in the cavity of the mold which was formed by the core print-pattern E and the firm support thus given over a centrally disposed circle larger in diameter than the vessels to be cast causes the end portions N N to be immovably fixed in the mold in proper relation to the interior surfaces of the latter, without the aid of any further supporting device or the like.

When the upper part C of the flask, containing the external mold F has been placed in position, the mold for casting the jars is complete. The casting of each pair of jars is effected in a single operation either by means of a single gate M or with the aid of a plurality of gates. The latter can be arranged in any desired position. In cases where the jars are to be provided with cast feet or the like, the pattern B B E is made hollow and the plate P supporting same is provided with an aperture 1?, which allows of pushing outwards by means of cams or the like P rods P which can be caused to project through apertures in the base of the pattern in order to form holes in the mold for casting the feet. This device is illustrated in Fig. 8; other suitable means can be used for the same purpose.

What I claim as my invention and desire to secure by Letters Patent of the United States is In means for molding hollow articles with bulged or swelled walls the combination with a mold having cavities arranged in pairs with their axes in alinement and having a cylindrical recess intermediate of each pair of cavities of larger diameter than the orifices of the cavities, with cores connected in pairs and a center piece integral with each pair of cores, and adapted to support same in the mold, said center-piece being of larger diameter than the apertures of the articles to be molded, and of the same diameter and breadth as the cylindrical recess in the mold to fit accurately therein substantially as described.

In witness whereof I have signed this specification in the presence of-two witnesses.

LUDOVIO AUGUSTE WILOZEK.

. Witnesses:

PAUL JosEPH EDOUARD OARoN, BERNARD KOPITZKE. 

